Pre-pend module name with "gallery-" prefix.

Hi,
YUI Gallery modules need a "gallery-" prefix. This pull request updates the necessary files to contain this prefix.
I updated the files, ran `yogi build --build-dir=../build` from your src directory, ran yogi serve and your tests and examples looked good. You may want to verify yourself.

Could you merge this pull request and submit a new cdn request so I can include in the gallery build?

Thanks,
Tripp